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https://issues.apache.org/jira/browse/NIFI-4969?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16397300#comment-16397300
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ASF GitHub Bot commented on NIFI-4969:
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Github user asfgit closed the pull request at:
https://github.com/apache/nifi/pull/2539
> Failed to import versioned flow when processor uses "Event Driven" scheduling
> -----------------------------------------------------------------------------
>
> Key: NIFI-4969
> URL: https://issues.apache.org/jira/browse/NIFI-4969
> Project: Apache NiFi
> Issue Type: Bug
> Affects Versions: 1.5.0
> Reporter: Bryan Bende
> Assignee: Bryan Bende
> Priority: Major
> Fix For: 1.6.0
>
>
> Create a flow where a processor has scheduling strategy set to event-driven
> with concurrent tasks set to 0. Start version control on the flow, and them
> try to import a new process group using the flow from previous step.
> The error is because during import we set the concurrent tasks value before
> the scheduling strategy, and StandardProcessorNode line 630 throws an
> exception if the tasks is < 1 and strategy is not event driven.
> The exception also does not report any message so it is hard to figure out
> what the issue is.
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